Do the following: - set Display Units Scale to cm - set System Unit Scale to cm - create a box primitive with dimension 100x100x100 cm - go to Utilites - Measure and check the dimensions of that box. It is 100x100x100 cm - now, set System Unit Scale to mm - check the dimensions of the box again. They are 10x10x10 cm. The…
They really don't need to be the same. System units is the important setting as that affects interaction with other packages, world scale and things like viewport clipping. If you set it to cm, you have a 1:1 relationship with fbx's baseline, unreal, substance and many other apps - if you set it to anything else you…
If you don't want trouble with units, ever.. Set system units to centimetre Set UI units to generic And never change them from that unless you have a very good reason (Eg. You're building a whole city to scale)